Undrained Behavior of Silty Sand and the Role of Isotropic and Consolidation
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 144, Issue 4
Abstract
The characteristic features of undrained behavior of a silty sand are investigated for a range of initial conditions for both isotropic consolidation (CIU) and consolidation (). The silty sand contains approximately 10% natural fines. The steady-state line (SSL) for -consolidated specimens is slightly below the SSL for isotropic consolidated specimens. The so-called reverse behavior for silty sand is not observed for CIU, although it is observed in some cases for . Earlier studies claimed that the shape and location of the consolidation line with respect to the SSL can explain such behavior. The findings of this study suggest that the liquefaction potential, a key parameter for observing reverse behavior, depends on the state of the soil and shows a unique relation to the state parameter () irrespective of the type of consolidation. However, the stress ratio at the triggering of liquefaction, , and liquefaction resistance, , show slightly different relationships with for isotropic and conditions. This finding has practical importance for estimating liquefaction strengths, triggering of liquefaction, and developing a -dependent constitutive model both for isotropic and consolidation.
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Acknowledgments
The first author acknowledges the financial support of the University Presidents Scholarship (UPS) from University of South Australia (UniSA) and the study leave from Dhaka University of Engineering and Technology (DUET), Bangladesh for his doctoral study.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 144 • Issue 4 • April 2018
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©2018 American Society of Civil Engineers.
History
Received: Nov 23, 2015
Accepted: Oct 12, 2017
Published online: Feb 2, 2018
Published in print: Apr 1, 2018
Discussion open until: Jul 2, 2018
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